Lighten Up

Title: Lighten Up

Rating: 2/5

Given the desire to have a puzzle where the colors steadily faded as one travels inward, there are lots of un-twisty regions.  Hence the easier rating.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must multiply to the indicated product.   
• Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule. 

Microscopic

Title: Microscopic

Rating: 4/5

I suppose this one would pair nicely with Petri Dish in name, but it's not quite as difficult as that one.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must add to the indicated sum.   
• Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.

Nothing

Title: Nothing

Rating: 2/5

In the last of the tweaks, this week's puzzle is a mix puzzle with 0 thru 8 instead of 1 thru 9.  And yes, this really is a drink: it's made with Malibu rum, Midori, pineapple juice, and it's served on ice.

The official rules:

• The digits 0 through 8 appear in each row and each column exactly once.
• Digits in each shaded region must add to the indicated sum (denoted by +) or multiply to the indicated product (denoted by *).   
• Squares with multiple colors contain a number that’s used in the sum/product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that repetition doesn't violate the first rule.

Nada

Title: Nada

Rating: 2/5

Continuing the theme from last week's puzzle, here's a product puzzle with one tweak: 0 thru 8 instead of 1 thru 9.

The official rules:

• The digits 0 through 8 appear in each row and each column exactly once.
• Digits in each shaded region must multiply to the indicated product.   
• Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.